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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/http/http_cache_lookup_manager.h"
#include <memory>
#include "base/values.h"
#include "net/base/load_flags.h"
namespace net {
// Returns parameters associated with the start of a server push lookup
// transaction.
std::unique_ptr<base::Value> NetLogPushLookupTransactionCallback(
const NetLogSource& net_log,
const ServerPushDelegate::ServerPushHelper* push_helper,
NetLogCaptureMode /* capture_mode */) {
std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
net_log.AddToEventParameters(dict.get());
dict->SetString("push_url", push_helper->GetURL().possibly_invalid_spec());
return std::move(dict);
}
HttpCacheLookupManager::LookupTransaction::LookupTransaction(
std::unique_ptr<ServerPushHelper> server_push_helper,
NetLog* net_log)
: push_helper_(std::move(server_push_helper)),
request_(new HttpRequestInfo()),
transaction_(nullptr),
net_log_(NetLogWithSource::Make(
net_log,
NetLogSourceType::SERVER_PUSH_LOOKUP_TRANSACTION)) {}
HttpCacheLookupManager::LookupTransaction::~LookupTransaction() = default;
int HttpCacheLookupManager::LookupTransaction::StartLookup(
HttpCache* cache,
CompletionOnceCallback callback,
const NetLogWithSource& session_net_log) {
net_log_.BeginEvent(NetLogEventType::SERVER_PUSH_LOOKUP_TRANSACTION,
base::Bind(&NetLogPushLookupTransactionCallback,
session_net_log.source(), push_helper_.get()));
request_->url = push_helper_->GetURL();
request_->method = "GET";
request_->load_flags = LOAD_ONLY_FROM_CACHE | LOAD_SKIP_CACHE_VALIDATION;
cache->CreateTransaction(DEFAULT_PRIORITY, &transaction_);
return transaction_->Start(request_.get(), std::move(callback), net_log_);
}
void HttpCacheLookupManager::LookupTransaction::OnLookupComplete(int result) {
if (result == OK) {
DCHECK(push_helper_.get());
push_helper_->Cancel();
}
net_log_.EndEventWithNetErrorCode(
NetLogEventType::SERVER_PUSH_LOOKUP_TRANSACTION, result);
}
HttpCacheLookupManager::HttpCacheLookupManager(HttpCache* http_cache)
: http_cache_(http_cache), weak_factory_(this) {}
HttpCacheLookupManager::~HttpCacheLookupManager() = default;
void HttpCacheLookupManager::OnPush(
std::unique_ptr<ServerPushHelper> push_helper,
const NetLogWithSource& session_net_log) {
GURL pushed_url = push_helper->GetURL();
// There's a pending lookup transaction sent over already.
if (base::ContainsKey(lookup_transactions_, pushed_url))
return;
auto lookup = std::make_unique<LookupTransaction>(std::move(push_helper),
session_net_log.net_log());
// TODO(zhongyi): add events in session net log to log the creation of
// LookupTransaction.
int rv = lookup->StartLookup(
http_cache_, base::Bind(&HttpCacheLookupManager::OnLookupComplete,
weak_factory_.GetWeakPtr(), pushed_url),
session_net_log);
if (rv == ERR_IO_PENDING) {
lookup_transactions_[pushed_url] = std::move(lookup);
} else {
lookup->OnLookupComplete(rv);
}
}
void HttpCacheLookupManager::OnLookupComplete(const GURL& url, int rv) {
auto it = lookup_transactions_.find(url);
DCHECK(it != lookup_transactions_.end());
it->second->OnLookupComplete(rv);
lookup_transactions_.erase(it);
}
} // namespace net
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